Kimberly-Clark Australia Pty Ltd v Arico Trading International Pty Ltd

Kimberly-Clark Australia Pty Ltd (the appellant) appealed to the High Court of Australia against orders of the Full Court of the Federal Court of Australia. The dispute concerned the validity of a patent for a disposable diaper and alleged infringement by Arico Trading International Pty Ltd (the respondent). The respondent had sought revocation of the patent on grounds of invalidity, including insufficient description of the invention.

The High Court was required to determine whether the patent was valid, specifically addressing whether the complete specification adequately described the invention for the purposes of the *Patents Act 1990* (Cth). This involved considering whether the claims formed part of the complete specification for the purpose of assessing sufficiency and whether the sufficiency of the description should be assessed by reference to a skilled addressee. The Court also considered the application of transitional provisions under the *Patents Act 1990* to a patent granted after the commencement of that Act but in relation to an application lodged under the repealed *Patents Act 1952* (Cth).

The High Court allowed the appeal, setting aside the orders of the Full Court. The Court remitted the matter back to the Full Court for determination of the remaining grounds of appeal, excluding those previously abandoned. The Court's reasoning, though not fully detailed in the provided text, indicated a departure from the initial decision of Burchett J in the Federal Court. The outcome was that the appeal was allowed, and the case was sent back for further consideration by the Full Court.